temptest, ok first of all, at your size you should still be making gains naturally. However, it is your body, do with it as you will. If you feel that you must start juicing at this point (I probably started too soon myself), first continue to do research on it. Second, get a body composition test. This is not intended as a dis, however, I constantly hear from one guy or another that he has virtually no body fat when he is clearly 15%+. If you need to "increase definition in your abes bigtime" as you say, then let us assume that you are 14% bodyfat (below average but nowhere near sporting a ripped 8 pack). That means you have a lean body mass of about 150 ibs. It also means that you have about 24 ibs of body fat. If you want to have a nice set of abes you probably need to be about 6%. At your current weight, you need to drop about 14-15 ibs of fat.
$300 is not going to allow you to do a primo/anavar cycle, so stick to the basics. Were I in your situation test enathate would be a prudent choice. Frontload 800 mg the first week, and run 400 mg for the next 9. Keep some liquidex on hand in case the bloat becomes excessive or your nipples get a bit too sensitive and follow up with h c g and liquidex post cycle. Yes you will retain a little water, however your goal is to look more impressive afterwards, so you are trying to gain a little extra size and lose a fair amount of bodyfat. If you train intelligently & your diet is correct you should be able to lose 10+ ibs of fat and gain a fair amount of lean mass since this is your first cycle.
Again, before you start, please continue to do research on steroids, their side effects, training, nutrition etc. Good luck bro.