PC and CF are the same thing. There are just different bases, such as the screw in or the plug-in types. At least, I think they are ;P.
There are some posts/tank of the month articles (in Reefkeeping Online) that used PC to keep all types of corals, including SPS. So, it can be done. It is important to remember that you can place corals that need more light high up in your tank.
However, it isn't ideal but you didn't mention SPS so I don't think it really matters. Maybe take a peak at some T5HO lights, I don't think the price is that much different and they have good light output. That way, if you get the SPS bug you can forge ahead without worrying.
I suggest looking at MuchoReefs TOTM tank:
http://reefkeeping.com/issues/2003-08/totm/index.php
Still one of my favorites. Although, I believe he has moved toward LPS now (probably Acans, I dunno).
With LPS and softies you don't need mega flow (i.e., 50X+ turnover). I would check out the Hydor Korallia's, they are inexpensive and produce good flow and are lower wattage than say Maxijets of similar throughput. A couple of 2's would be good IMO.
Not sure about a timer for your powerheads. Maybe some type of wavemaker? Personally, I think I would wait on that since it's something that you can add later and isn't a necessity.
Your other questions I think were already answered.
The UV sterlizer will likely improve the clarity of your water a bit. I don't think it's a necessity though.
You may also want to upgrade to a 75 GPD RO unit. Probably not much of a jump in price. There are some RO/DI sponsers on this site you should look into.
Cheers.