For "looking professional" you will need as big camera as you can take and DSLR is your best option :)
But If you want to keep camera compact — you better look at mirrorless cameras.
If you are tight on budget, buy G3 — it is best when you want great options by the decent price. As a bonus you will get exceptional video recording ability — better than most camcorders.
But if you need maximum image quality, check Sony Nex 5N or its family.


