i'm just about to buy a Luna II card (not enough money for a Pulsar

Take a look (and tell me if you found better !!) :
They offer Luna II for 335 $us (in France : 434 $us) and Pulsar II for 1.025 $us (instead of 1.455 in France).
I've already bought stuff in this store and they are serious (i know it looks like an advertisement but prices seem very attractive to me).
Before ordering the card, i have a question you may help me to answer : I'm no professional so i'm not in need of the ADAT I/O of the pulsar, but having more DSP would be usefull. Do you think it could be a good idea for me to buy a second Luna II later to reach 6 DSP ? (it would cost me almost half the price of a Pulsar II!)
It seems to be a bunch of creamware users round here, so you may know if there's any inconvenient to this solution.
thanks
CU
Bluzz