for the money right now, The Speed Passion GT2.0 LPF or Pro is very nice.
Right now, the LPF is $90 direct from Speed Passion and the Pro is $125. For brand new, really good prices.
what I really like about the GT2.0 Pro is that for its size, it can easily handle a 4x4 SCT setup. Has all the cool features you would expect (the LPF has them also) as far as boost, etc. and it can use that nice Hobbywing LCD Programmer card which you can buy for about $20 shipped. Basically the same looking card that the Orion uses.