SRAM S300 - you don't realise how floppy square taper spindles are until you upgrade to an external bearing crank. Winstanleys have them for £75 with free delivery, making it an even easier choice. The S100 uses Truvativ's proprietary Powerspline BB, so I wouldn't touch it with a barge pole as you never know when they're going to stop making BBs for them.
SRAM S300 - you don't realise how floppy square taper spindles are until you upgrade to an external bearing crank. Winstanleys have them for £75 with free delivery, making it an even easier choice. The S100 uses Truvativ's proprietary Powerspline BB, so I wouldn't touch it with a barge pole as you never know when they're going to stop making BBs for them.