Personally, I would only go with a super-short SYE if I had an extremely tall lift. For most lifts, and I have had up to 5.5" of lift when I had my previous RE lift, a standard SYE works fine. Why go with a standard SYE over a SS SYE? Because a standard SYE still uses the speedometer gear housing and speedometer gears so you don't have to also purchase and install an electronic speedometer calibrator.
So far as a good source for a SYE and CV driveshaft goes, I have been trusting Tom Wood at
www.4xshaft.com for 15+ years now. He carries good quality SYE and CV driveshaft kits, and his pre and post sales support is unsurpassed. Plus Tom is just a super nice guy, I finally had the chance to meet him several years ago at a 4x4 show. If you call them, ask for Tom personally and tell them I sent you directly to Tom.