The 2011 one has access slots to get at your jersey pockets (just to the outside of the reflective stripes), but they're a bit fiddly.
As for size, you could swap them at collection if they were too big/small. Of course, you can't try it in advance, which is why finding one that fits and works for you now is probably better.
No point going too hair-shirt on it all, it's not like you do everything on the cheap anyway.
The 2011 one has access slots to get at your jersey pockets (just to the outside of the reflective stripes), but they're a bit fiddly.
As for size, you could swap them at collection if they were too big/small. Of course, you can't try it in advance, which is why finding one that fits and works for you now is probably better.
No point going too hair-shirt on it all, it's not like you do everything on the cheap anyway.