Looking to Upgrade my E-510

What are you looking to upgrade?

a) Low light capability?

b) Better DR?

c) Improved AF? (C-AF? BiFs?)

d) Sharper image?

e) 'bells and whistles'  Tilt/swivel screen, control knobs, electronic level, art filters)

A- could be improved w either a faster lens or body upgrade

B or C calls for an E-3 or E-30

D would best be served by a lens upgrade, then picking up an E-5 when that is replaced.

E- Can be gotten in E-30, and most in 620 as well.

I got the impression you're seeking higher quality/sharper images... for that I'd say upgrade the lens, as the 30/620 wont give you much more in the way of sharpness (higher resolution is balanced by heavier AA filter)  The body that will give you a sharper image is the E-5

If you don't see moving over to m43 any time soon, I'd look for a 12-60mm over the 14-54.

If budget is really tight, look for the 14-54 MkI.

And if you do see yourself adding an m43 PEN, OM-D, or G camera down the line, the 14-54 MkII will give you the best compatibility.

--
Art P
"I am a creature of contrast,
of light and shadow.
I live where the two play together,
I thrive on the conflict"