kingman sells the tl as a tourney level gun. basically everything about it has been upgraded in some fashion. but it can be upgraded further. any spyder or spyder compatible has limitless options for upgrade and are inexpensive to do so.
as far as whether you could use a tl in a tourney? i don't play tourney ball but it seems that the tourney scene is based around newer high fire rate guns like impulses, angels, cockers, etc. with a highly upgraded tl you could go into a tourney and hold you own if you have the skills. but eventually you'd probably want ot upgrade to a better marker.
look into the black dragun. it's basically a spyder clone with a e-trigger frame. it's under 200 bucks and it shoots 13 bps out of the box. all you need is a better barrel, nitro, and maybe a new bolt to compete with the high fire rate guns. word on the street is the black dragun trigger feels as repsonsive as guns that cost a heck of a lot more.