I don't think there will be an offer like that for who knows how long. I'd either wait until L75 for the speedblades, however they could have another iron set by the time we get Pinehurst in late April-early May (6 weeks before the US Open). A better idea IMO (based on your clubs in the profile) is get the high-level CG16's (74/76/78/80, pick 3) when you get to those levels or at least the L64 ATV 60W, perhaps a better 3W (G20 @58 [54], or the RBZ @69), and Putter (same as now, L66).
Your Driver and Irons are just fine. You can only gain 3 yards on less precision with XHot L67, and the G20s are the only thing that would be good until L79 for the Bladez or L75 for the Speedblades.