[RC-Monster Mike]

I only recently picked up the RD-Logics line as well. I have quite a few customers using them and haven't heard of any problems yet. They appear to be very well built (looking at them) and I am pretty convinced that they are as solid as any other cvds, especially for the price! I can get the MIP stuff, but it is a bit of a hassle (must go through a friend).
The GA bulks are an ounce or so heavier (each) than many other aluminum bulks. FastLane is tough to beat on value for the price, and they will replace any of their parts for $8 if something fails. This type of backing of their products is one of the reasons I picked them up as a supplier. They have quality stuff and are willing to stand behind this quality!

12 cells (good ones) are capable of providing explosive acceleration and speed, but the more cells you run, the faster and more explosive the speed and acceleration can become!
The Pletty motors are powerhouses for sure (4 pole design means a lot of torque!), but they are not cheap (I am set up as a dealer for the plettys, but have yet to place an order due to the price!). The 7xl on 16-18 cells is a s***load of power and requires a very tough drivetrain to handle it. How it compares to the bigmaximum, I don't know, but I would imagine it is at least on par in the power department (for 1/3 the price, no less).