I know most of people go to m4/3 as their 2nd system, but looks like I'm going the other way around. After 1 year own and use EPL-1 going everywhere with it, now I'm considering to own the second system. As much as I like the capability of EPL-1 sometimes I just miss the convenient of DSLR especially in fast AF part. Tough I try pre focusing technique, burst, and mainly using prime 20 and 45, still sometimes I get out of focus image due to the EPL-1 misfocus to background or the LCD trick me with it's low res display. The fact that EPL-1 mainly use push button for changing focus box operation not helping the problem at all. I do own E-1 as my signature already shown, and even tough the color tone and image quality still please me under bright sun, I must admit there's a lot of things that my E-1 already behind. The fact that 4/3 is a dead end system with little option in term of fast prime lens and currently Oly only offer its very expensive E-5 as DSLR altenatives drive me to thinking about owning second system outside 4/3 and m4/3. Nikon D3100 really tempt me as secondary system with it's mini DSLR body, it's a bit plasticky but it's cheaper choice compare to own E-5 or upgrading EPL-1 to EP-3 that still expensive. Heck even the discontinued E-620 some store still selling cost a lot more then D3100 ($500 for E-620 body only vs $500 for D3100+18-55 kit lens). Now since my experience with DSLR outside Olympus system a bit rusty nowadays. Try Nikon D300 and Canon 7D and 1000D a bit, but not fiddling with it. There are some consideration I would like to ask. 1. Does D3100 AF really that good compare to EPL-1 for capturing fast to moderate moving object? How accurate is D3100 Nikon PDAF compare to m4/3? How about backfocus problem plaguing the DSLR? Any experience with that? 2. One thing that I really depend on EPL-1 is its accurate metering and good quality of OOC JPEG...but I see most of DSLR sample rely on RAW (which most of the time being corrected via software) how good the JPEG of D3100 compare to EPL-1? Is this thing going to bother me? Because I hate to do color correcting for every picture I take before I can show it to someone else... 3.Most of good Nikon fast prime lenses cost much more compare to m4/3, except a few of it like 35mm f1.8 DX, how good in term of quality between 35mm f1.8 DX to 20 mm f1.7 m4/3....and is there any lens alternative for excellent 45mm f1.8 m43 in DX lenses like 50mm perhaps?