Itching for upgrade but don't want unnecessary upgrade

Guys,

I'm itching for an upgrade. I haven't upgraded anything this year and usually I upgrade every year. It's not like I'm unhappy with any of my equipement. Just feel the want (not need) for upgrade.

My equipment list is as follows (and what I've tried to upgrade to -- but decided not to):

Receiver: Pioneer Elite SC-25 (tried SC-37, not liking it at all)

Projector: Panasonic PT-AE300U (tried 4000U, but supposedly there is no difference in lightpath seal, so the chance of dust getting in is not going to be better anyway -- so no upgrade there)

CD player: Pioneer PD-D9J (tried Emotiva CD player, not liking it, tried Cambridge Audio 640c, not likiting it)

BD player: Pioneer BDP-23 (tried multiple BD players - especially for upscaling - other than BDP-09 which I used to have, nothing I like better)

VP: Denon DVP-602CI: it's already 2 years old, but I can't seem to find anything better for anything less than $3,000 and I'm unwilling to spend that kind of money to upscale cable's 720p to 1080p

Speakers: PSB Century 300i x4, PSB Image C5 centre, PSB SubSeries 300 sub

Dedicated/separate electrical circuit for A/V from the rest of the house with battery backup, hospital grade surge protector and AC filters.

Any idea what should I upgrade?