I just happened by this thread while browsing. The answer to this question is sort of like the 'holy grail' of the body building and sports physiology quest for knowledge. When the members post the word, and you will see it many times, 'RESEARCH' they could not be more right. I spent eight years in total in earning a PhD, 4 yrs for a bachelor in biochemistry and molecular physiology and then Phd in organic chemistry for synthesis of steroid molecules and molecular messengers. Sometimes I wonder if that was enough research. The reason I say this is because I had very distressing acne on my shoulders and back and some very bad spells of sleep during the first 'cycle' that i did. As we all know the consistancy of your blood levels of steroids is very important so dosage and dosage frequency are paramount when designing a steroid phase. I prefer the term phase which goes against the decades of the use of the word cycle, to me cycle represents a system with the same beginning and end points with a gradual up and down back to baseline, anyway that aside. Your dose and frequency is more important than the drug itself. However when choosing the drug don't run out and get enough trenbolone to do 100mg per day for 10weeks with oxymetholone to kick it off and a methenolone chaser. That would be like going and buying a ferrari for your first driving lesson.
If I may:
my suggestion would be to stick to the absolute basics for a first attempt
if you are going to use one drug the answer is simple...testosterone propionate for many reasons not the least of which is that the propionate ester allows for less side effect interference...............anyway your research will solidify all the reasons
if you are going to use two always choose an androgen and an anabolic, I look at testosterone as already covering that but my obvious choices having seen at a scientific level how these drugs interact and there synergies and 'parasitologies' if you will: nandrolone decanoate, boldenone undecyclenate and I know I'm eating my words methenolone (but don't worry you probably cant afford enough of it to make it worthwhile without a powder source) nandrolone by far best choice for me.
if you want to cut down on injections the of course test and methandrodienone dbol or turinaol tbol or methenolone tabs.
you can cut down on the androgenic nature by going with nandrolone and dianabol a very popular combination.
I wont say to much more because around here your intellect is sometimes judged by the number of posts you have made so I dont' want to come off as a noob who sits in the gym spitting out terms like dbol, deca, roids and gettin ripped.
The answer to your question is that there is no answer to your question, there are infinite answers as there is infinite steroids out there and to come. I have personally synthesized over 40 different cholesterol based steroids 35 of which had a ana or andro component some with incredible potency (on rats that is). you just have to keep your eyes open for info all the time and make a basic, tried and true decision on what to use.
Most important is to use an antiestrogen, letrozole is the most powerful tool available today for combating the formation of feminizing estrogens. I like mesterolone as a blocker due to its DHT nature, the use of both as they cover both types of antiestrogen is a great stack as they work in different ways. if I could have only one it would be letrozole at 100 micrograms per day. No you do NOT need 2.5 mg per day, dont wast your money, look up references and see for yourself. I used 25 micrograms per day during a 'cycle' totalling 800 mg per week with no side effects and excellent test/estriol throughout.
Hope this was of some help, but keep reading these guys who have been around awhile and have lots of experience they know what they are talking about.