I'm really interested in getting Battery 3 whilst it's still on offer for €99, but I've not long had Linplug's RMIV which I waited almost a year for (and hardly use for that matter). I really like NI's stuff and Batt3 sounds really good, where RMIV sounds really dull - but then there's the matter of getting my upgrade to Live 8! - curse the p155-poor euro exchange rate!!!
Got a few weeks before the offer ends to decide, but I have a feeling that I'll succumb to my weak-willed needs :-)