well im going through the same thing....although im a few steps further along then you.
I just got a DAS DX5 (15" riser), and I paired it with the cheap $100 wood/glass trad tech black max limb. (i've shot it at 3 yds in my apartment...don't tell the landlord!)
Im going to play with a stick on elevated rest and a das shorty plunger. Mainly just to learn and see if I like that system, since i've never tried it before. (but id also like to use the same arrows as my other bow for now).
I don't think you'll have any issues with sight window size on the 17", if you go 13" or 15" you may. Especially since you shoot instinctive, which I assume means split finger.
My main "academic" goals are to set the bow up for 3 under fixed crawl and adjust the tiller to quiet the bow (current bow is loud with a fixed crawl), see if I like the metal riser, see if I like the adjustability of the DAS system, and to see if I like the plunger system.
My main "practical" goals are to create an "ultimate hunting bow"!!!!
I want to cast a 600-650 gr arrow with great authority, awesome trajectory, exceptional accuracy, while being whisper quiet. So im playing with the 55# trad tech cheapo limbs (which actually seem like a good limb!), if they wont do what I need i'll probably upgrade to a dryad ACS (RC or LB) or a zipper Z4 limb of a higher poundage.