The prob with the Onyx 230 is it has no balancing capabilties for lip (or any other type that would need balancing like LiFe batts) and you would have to buy a standalone separate balancer to balance charge lipos.
If you have any inkling that you'll run lipo down the road, get a charger that has a balancer builtin, that makes it just a matter of one additional connection versus having to connect a separate balancer to the charger and then to the lipo.
The Thunder AC-6 linked above would be hard to beat given its capabilities, cost and reputation.