Read it Later vs. Instapaper

Which one do you prefer and why? I need an app like this... leaning towards Read It Later ($3) over Instapaper ($10) mainly because of the price. RiL has some bad reviews, but I think most of the issues will be corrected with time since this is a relatively new app. Instapaper seems way overpriced to me.

http://appshopper.com/productivity/read-it-later-pro

http://appshopper.com/productivity/instapaper-pro

I tried the tilt scrolling on a friend's phone and it seemed like a gimmick to me. It was neat at first, but I found it much easier to use my thumb to scroll. It almost seemed like work trying to keep the phone balanced while I read and then find the right angle to tilt it to make it scroll to the place I wanted. So tilt scrolling means nothing to me.

I do like that Tweetie has instapaper integrtation. If the prices were the same, I would probably choose instapaper but with it costing 3+ times more that RiL, I'll probably just give RiL a shot.

I went for the paid version of Read It Later.... very happy with it so far. I really like the Firefox extension. I had a little bit of trouble getting it to play nice with FoxMarks, but I think I have it set up correctly now.