CA sportlines seem to be crappy guns. The internals are worse than the majority of clones. They have a weak sector gear, blue nylon bushings, blue aluminum barrel (probably low quality aluminum) Everyone about the CA sportlines seems to either be "bleh" or average clone quality, the majority of it seems to be "bleh." lol CA prolines seem to be solid guns, but from what I've seen on reviews and forums, they really seemed to drop the ball on the sportlines. I've used a CA sportline P90 and it was garbage...this is coming from a guy who has only owned clones. lol
G&G sportlines are probably going to be your best bet. From what I'm seeing over on ASF, the stock accuracy of the non-blowback combat machine is horrible. (due to a low quality barrel) If you replace the barrel, they supposedly shoot nicely.
The G&G plasticas are better than the G&G CMs, I would personally go with a G&G plastica. Better body, internals, decent stock barrel. I don't like JG armalites at all personally. (the plastic body ones at least) The motor gives a great ROF on a 9.6v, but the plastic on them is very bland. Not nylon fiber like on the G&G sportlines. Internals are pretty good, but nothing astounding. Accuracy is average for a clone.
I'd look into CYMA (at or above CM032s are supposed to be solid guns) My friend has a CYMA AKM (FM/W version) and it's a nice gun. Shoots WAY too hot (at least 430 O.o), but is very accurate for a stock gun. Solid gun overall.
JG AUG, JG/E1 G36s (E1s have metal bearings, I'm not sure if JG has metal bushings in their G36 series. They didn't used to), G&G sportlines, or a CYMA AK/M14/MP5 is what I would look into for a $200 budget. If you don't care what model (IE M4, MP5, etc) I would personally go for a G&G Plastica M4/M16.
If you have $250 or more, look into G&G, CA prolines, or KWA.