I have the Minimed Revel and love it. It comes in 2 different sizes, so you can pick the reservoir that fits your needs (I use the 1.8 ml which holds 180 units of insulin; there is also one that holds 300 units). The Ping only comes in one size, which holds 200 units of insulin.
Overall, the Minimed has exceeded my expectations. I've had my Revel for a year now and it has worked flawlessly. I've gone hiking, camping, backpacking, distance running, cycling, etc -- and this baby has just kept on ticking!! I do put a small screen protector over the screen and I use skins available from SkinIt.com to keep it somewhat scratch-free. Despite all this activity, I have learned how to stash it inside a spibelt and tuck the tubing in my pants to keep it out of the way. Never ripped out a site or damaged my pump.
With pumps, you have to be a little creative. Thankfully, they are pretty small now, but you have to find creative ways sometimes to hide it. I know some people will cut very small holes in their pockets and then run the tubing through the hold and keep the pump in their pocket. This keeps the tubing AND the pump out of the way. Some people completely rely on Spibelts. You have to experiment and find what works right for you.
I would highly recommend getting one. If you're active and have any kind of variable schedule, a pump is really going to help.