I would think that the best answer has a lot to do with what type of system you want to end up with. Are you doing a recirculating setup ( RIMS or HERMS ) or infusion only, batch/fly/no sparge, and are you looking to do any of the low o2 stuff? Do you use pumps or is it all manual lifting?
Granted, you can make pretty much anything work in whatever method you want but if you are laying out the cash it might be worth considering the end goal system ( as opposed to the current or intermediate system).