Canon EOS 50D – Best Remote Controller for $? :I’m looking at two remote controllers for the EOS 50D: - (1) Opteka Timer Remote Control ($69.95); or (2) Canon TC80N3 Time Remote Controller ($141.90). Prices are at Amazon.com.Both seem to offer basically the same modes of operation -- and I won’t be using this device on an everyday basis. How good is the Opteka’s quality and durability? Is Canon’s overpriced version worth the cost? Which one would you choose?Thanks.