Bit of advice please. For my EOS 400D/XTi I'd like a remote control principally to trigger the shutter for long exposure (to avoid vibration). The RC1 has a two second trigger interval and according to Amazon.co.uk will also control bulb exposures - 1st press to open shutter and 2nd to close. I think this is all I need but is there anything extra the the RC5, which is more expensive, offers.
PS if anybody can suggest a cheap place to buy one of these whilst I'm in Naples, Florida in 2 weeks time even better. UK price is about 20GBP / 38USD.