True I have heard most 1333 will get to 1600 easy, with a purpose 1600 kit you will get lower timings than an overclock will probably allow, but not much lower.
Looking at Scan 1600 Doms are actually cheaper than 1333. Dunno where you're buying from but it could be worth a check. If not 1333 OC'd is a fine choice.
EDIT: Just seen you changed your mind already