i mostly use icab. i have omniweb sneakypeek, opera, ie, netrape, and classic communicator in my internet dock.
i would get rid of the last 3 in a heartbeat if any of the 3 others could do everything site builders expect a a browser to do.
my quick opinion of the new browsers -
icab - fast, pretty stable, great back button, easy scrolling, works with default folder x, more prefs than anybody really knows what to do with, needs user modification to work optimily, still doesn't implement round buttons, lacks full use of flash and java, renders great once css2 is unchecked.
omniweb - best gui, slow but stable, easy scrolling, doesn't work with default folder x, wait between pages is annoying while looking at blank color page. this is the one i want all the bugs really fixed in so i could want to use it.
opera - reasonable speed, free version has limited gui functionality for toolbar, uses agua for buttons, possibly the most stable, works with default folder x. closest to netrape and exploiter but with a little less functionality.