I can't give a valid statement on it, but the SX basses always looked a little questionable to me. Alot of them look great, but are only like 150 bucks sometimes... Suspicious. I hear good things about the OLP MM model, and thats only about 250 I think. I'd probably save te extra 100 for the OLP.
^I've only ever heard good things about SX. Of the few I've played (a five string Jazz and a four string Jazz) I'd say SX > OLP. Note that everything I just said is coming from someone who swears by OLP.
**** yes!!! I tried the fives string. It rocks. Im going to place an order.