I can pretty much guarantee you'll be on here offering the same advice to newbies in 3 months time if you get a HPS!
Get the 250w HPS mate, you'll be shocked by the results compared to what you've done previously. I'm only just coming up to finishing my first proper indoor grow and I'm incredibly pleased with the results. Because I started off with CFLs, then noticed it wasn't going to get the results I desired, I then paid out for a 400w HPS. I wish I'd bit the bullet in the first place and bought everything in one go - the amount of time I've wasted waiting in for deliveries is ridiculous!!! My advice for anyone who doesn't need to go completely 'stealth' is buy a decent HPS light, tent, carbon filter and in-flow fan all at once... there's plenty of kits available from grow suppliers and off ebay for around £200-£300 ($300-$450)... sometimes less in fact. You will reap the benefits.... LITERALLY!!!
Look at this way. If I'd stayed with the CFL's I'd maybe have an ounce or so for my hard work...... but I invested a few hundred quid and now I've got a couple of oz of autos drying and 2 bagseed plants still going..... one has a main cola over a foot long and a few inches wide, the other has 2 slightly smaller main colas, plus god knows how many pretty decent sized buds lower down..... I'll probably have 3 to 4oz dry off those 2 girls now........ they look INCREDIBLE and there is NO WAY I'd have such good buds without my HPS.
Trust me (and all the other posters on this thread)... go HPS... you will not regret it!!!