I'm hoping that someone familiar with the GO line of engines can tell me if either of the following GO .28 engines would do fine in a somewhat heavy (9-ish lbs.) basher. A friend of mine had a GX5R in a D8 and that got me thinking about the GO line of engines. However, I want something with a pull-start or roto-start so I don't have to lug a starter box around. I know these are cheaper 3-port models, but I don't know what the difference is between the two and was hoping someone who had dealt with GO engines might know. Also, I wanted to make sure they aren't such a bargain-basement model that I get a poorly machined, pinchless engine like some people were getting with the GO-based Trackstar from Hobbyking.

The engines in question:

EDIT: Great...I can't post pics yet. There is a blue-headed .28 3 port that has the head milled so the head is a little more squarish and what looks like a composite carb. There is also a black-headed 3 port that has a round head that looks just like the R2800-M00HSG listed on the GO-Engine.com site but with a black head instead of silver and has an aluminum-bodied carb. Both are listed on Ebay, Amazon and few hobby sites.

Any help is appreciated. If these aren't any good, I'll probably go with an SH-based engine (LRP Z.28R, Losi 454, Dynamite Big Red, etc.)