Did you have a specific reason for wanting this particular setup? That's pretty different fo sho! How much does it hold? I prefer to carry both water and some type of electrolyte, can you do that with your new setup? So you don't carry a spare tube or anything or do you put that in your jersey or something ? I think I would need to see that in person before I made a decision. Guess I got a few of my questions answered.
Keep us posted on how you like it, ease a maintenance, cleaning etc.
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http://www.rei.com/product/815173/showers-pass-veleau-42-hydration-system-42-fl-oz?cm_mmc=cse_froogle-_-gpeLink-_-product-_-815173&mr:trackingCode=C1D0B459-B4C2-E011-9A77-001B21631C34&mr:referralID=NA&{copy:s_kwcid}=&mr:a dType=pla&gclid=CI_0xZ7D7a0CFQWDhwodzy975g
Showers Pass VelEau 42 hydration system offers 42 fl. oz. of liquid capacity, plus gear storage, in a seat-mounted design to free up your back and simplify rehydrating while on the bike!
With the saddle-mounted hydration reservoir, you can meet your hydration needs without having to carry a hydration pack or be limited by bottle cage mounts (or lack thereof)
Extending from the reservoir is a 47 in. tube that can be cut to fit your bike; tube is held in place against the frame with included mounts
Easy-access bite valve is connected to a retractable reel that's anchored with a strong magnet
To take a drink, simply grab the bite valve, bring it up to your mouth, drink, and then let the retracting cord and magnet re-secure bite valve—that's it!
The VelEau attaches to the bike with a seat post strap and a sturdy, ratcheting strap that goes through the saddle rails, keeping the system secure
Zippered stow pocket is great for stashing a patch kit, multitool and other ride essentials
Rear-facing attachment point lets you easily affix a rear blinky light (sold separately)
Wide-mouth opening makes it easy to refill the BPA-free 42 fl. oz. internal reservoir
Please note: the Showers Pass VelEau 42 hydration system is designed to fit a bike with at least 4 in. of exposed seat post and a saddle with standard rails