i would like micro four thirds. which one thou??

hi

i have a pan FZ150 for tele but i would like a micro 4/3 for excellent close ups.
also i will be going to silverstone in june for bike races.

other than going to silverstone, my main usage will be in the garden and days out with family so i want the best possible IQ without having to carry a DSLR.

thanks for advice. im looking at panasonic G3 from jessops.£389.99 not bad!