hey man, glad i can help out.
1. renoise is most def. one of the best trackers out there at the moment, as it's based on an old tracker (NTK) which had been coded by a spanish chap called Arguru. the guy is a legened within the tracking scene, known for his state-of-the-art applications.
2. there are 3 trackers which are out there with renoise. here it goes:
A: Aodix (Arugru's lastest project) -
http://www.smartelectronix.com/~arguru/
get Aodix Tracker v2.34, it's way better than v.3
B: Psycle -
http://psycle.pastnotecut.org/portal.php
the tracker which has the best sound engine to date.
lacks looping\sampling functions - but you can you VSTi for those purposes.
C: Jeskola Buzz - the first modular tracker.
has the largest database of users and extra generators\effects.
http://www.buzzmachines.com/ -> here you can get the full buzz pack + download all the extras (ALOT!).
that's about it. i'd still recommend you to move forward; try reason\fruity loops\orion.
if you need anything else, don't hesitate to ask.
best wishes
P.S.: almost forgot, thank god for "edit".
you can choose not to use loops in reason, and just use the GREAT drum machine. you are able take individual hits and create whichever drum sequences you want.