HDMI Cables and Bandwidth (1 Viewer)

[Relofish]

I've been re-assembling my home theatre and am shocked at the difference in price for HDMI cables. I bought a 1000EX Monster cable and even the shortest lenght was over $100. Can I get the same performance from Rocketfish, Belkin or some cheaper brand. I need in-wall rated and would use it for various BD sources.
Also, is there an issue with using a coupler for combining shorter length cables?

 

[gene c]

Monoprice.com and Bluejeanscables.com are the ones most often recommended around here.

I'm not sure how couplers affect signal transfer, if at all.