For mother's day my husband and kids got me a trunk rack for my bike but I am not sure that it is what I want so I thought I'd ask for a little help......

My bike is a carbon frame Specialized Ruby (Comp).

I need storage for long rides like century rides and training - there is only so much room in a jersey for my cell phone, sunscreen, snacks, 15 energy bars, chap stick, pepper spray, nun chucks, and 35mm (kidding on the last two). I feel like the hunchback when I get all packed up and ready to go.

I also need space for clothes when it may be necessary to change - I live in Idaho and it seems like all we do is change clothes. Windy one minute, snow later in the day, and then BAM 70 degrees. We do a lot of riding in the mountains and it would be nice to have a place to put a jacket and tights if the weather changes.

I also commute occasionally with a laptop.

I would like something that I can take off and on easily, with a quick release. I really don't want to have to get the tools out if to take a rack off if I decide to go on a speedy 20 miler.

Trek seems to have a nice interchange system. Does anyone use this system or one like it? Reviews? Can I use it on a carbon seatpost and a carbon frame? Where do I find the rack online? I can't find a picture of it. I rely on the internet and can't cruise around to different bike shops and check different systems out because we have two bike shops - one to the north 25 miles and one to the south 25 miles.

I have done some research and the overall suggestions seem to be "don't go with the cheap systems" - without being able to see them in person, I have no idea what is cheap and what isn't!

Thanks!