You have several options at the time.
Code:
Sbot : [url=http://www.bot-cave.net]Bot-Cave.net[/url]
+
Grinds like a beast
Easy loop and works fine
Alot of neat features
Possible to share with a friend (2 diff computers)
Best multiclient & Clientless!
-
New customers purchase down
Code:
iSRObot : www.bot369.com
+
Inbuilt loop (superb)
Auto-login
Grinds quite well
More ways possible to buy it then just paypal
-
'Expensive' compared to sBot
Code:
Tbot : www.bot258.com (never used so my + & - could be wrong)
+
Grinds fast
'Neat' features (from what I've heard)
-
'Expensive' compared to sbot
Code:
Stealthex : www.stealthex.org (Never used so can't know much of + & -)
+
Free
Grinds good
Nice features
-
No inbuilt loopscripts
Code:
Agbot : rev6.nihplod.com
+
Free
Cool features
-
No inbuilt loopscripts
imo, go for sbot

Hope this helped you.