RE: which engine?
You'll be paying a lot more than you want to spend to buy a Jet central. If you want something in the 30lb range at reasonable prices make sure you have a good look around. Talk to people actually flying the engines.
Its the only way you will get unbiased opinions. We dealers can tell you all day that the engines we sell are the best but until you actually speak with the end user its all pointless.
My 2 cents.