I normally wouldn't consider this upgrade, but I got the Gf-3 for 270usd with the 14 2.5mm. There's a chance I may be trading bodies with someone for an additional 50USD. Still not sure if it's worth it I'm happy with the GF-3 but I might go ahead since I will be able to choose the black GF-5 which is a little less prone to showing scratches and wear compared to my current white GF-3. Also, I like the additional FN button. The better screen and faster AF don't really concern me. Some things I'd like to know from anyone who's made the switch or has spent time with both. First, IQ - I remember reading some threads comparing the two before the GF-5 came out people were saying the 5 would have improved low light/high iso performance due to the sensor tweaks but also suffer from softer images in lower iso ranges. I don't know if anyone's been able to compare them by now and provide real results but I can't seem to find any info beyond those first few threads with purely speculative info. Second, I've played around with the GF-5 menu and it seems sluggish compared to the 3. I've tried it on at least two units, never did a direct comparison but that's how it felt. Finally, ergonomics - I know it's a bit bulkier, I don't like the feel of the hand grip so I'd like to know if it can be removed. Any input on these and anything else someone looking to "upgrade" might like to know would be appreciated. Thanks.