If you decide to run Deca alone, I don't think 200 mg/week is much worth the effort at all. I would up that to at least 300 mg/week if you have enough gear to run at least an 8 - 10 week cycle. Most posts that I have read seem to indicate that Deca sides are not noticeable until you go over 400 mg/week. At lower doses, you really needn't be too concerned about progesterone side effects, and possible gyno.
I will note that you seem to have done a little research and put some thought into your first cycle, and a good post. You should consider posting your stats also to help some bros out (age, weight, bodyfat, etc.) with recommendations. I am like you and the notable Deca sides (libido/deca dick) don't really bother me, but I get great results.
You will get a lot of opinions on running HCG throughout your cycle or just near the end. For more info on this and other PCT questions, if you haven't yet, go to the Post Steroid Cycle Therapy Forum on EF, under the main folder for Bodybuilding Forums .....http://www.elitefitness.com/forum/forumdisplay.php?f=81...... Please read all the Stickys, you'll be amazed how much you will learn and smarter you will be about PCT.
I personally prefer Nolva over Clomid, has worked great with less worries, but read up a little more, and you'll probably get more feedback from experienced bros on here about their preferences. You have the right idea about starting Clomid (or Nolva) awhile after your last Deca inject, since it is a very long acting ester, but 3 weeks seems a bit long to wait, 1.5 to 2 weeks is probably better.
Again, if you are committed to running Deca, and maybe at a little higher dose, then you may want to consider possibly stacking with Winny to help minimize/control some of the progesterone side effects. This works great say at about 40 mg/ED for this purpose.
Another good link to learn a little more about steroid profiles, stacking and PCT options, try http://www.bodybuilding.com/fun/catsteroids.htm, this should help some more as well. Good luck to you bro, welcome to the brightside!