the quesion you are asking is all relative.
its down to how you play, and whether you want to be able to slap a load of extras on your marker at a later date to get that little bit more out of it.
ive seen neddyboy with his tippy (on the first day he had it) , and was even present when he had his flatline fitted. its a marker, it fires paint, he's happy with it.
the site i go down has used basic spyders for a long time, they are realy easy to repair, and the spares are easy to get hold of.
in comparison. i feel the spyder is a more refined marker than the tippmann, but the tippmann is built as a more sturdy marker.
its down to prefferance, and you can only make that choice once youve played with both.
maybe try and find a couple of playes with the markers of intrest, and ask to borrow them for a few games some time. im sure they wont say no.