IMHO I would save the money to put towards something else like into engine work or something! I am biased though cause I like the look of the black convertable top. So I guess if you like the look of the hard top then go for it. Is it any particular brand?
http://www.kingmotorsports.com/category.aspx?cat=8
Here is a mugen hardtop for 2,500 which is the cheapest i've seen so yours is a good deal.