OK, here goes:
Not Xrumer. Takes A LONG time to learn how to use 'properly' and you do need to spend extras on dedicated proxies to get it to work for you. Oh and an extra PC you can leave it running on while it's sucking the life out of your broadband.
I would suggest tools that will help you create your own 'bots' to automate your marketing strategies. If you do not have any of your own, you can find many good ones simply by typing 'method' in the search bar here.
So the tools I would suggest you get (they are all on torrent sites, isohunt etc) are:
1. WinAutomation.
Will automate any windows task and browser task, ie filling in forms, spamming forums, etc. Simple to use and the best bit you can create an exe from each script which you can run from an external program (the next bit).
2. Autoplay Media Studio.
Lets you create interfaces to run all your winautomation exe's easily. and you can compile into a useable exe with all your wina exes inside with one click, easy to use.
I made a bot for registering at squidoo yesterday, just for a bit of fun, in under 20 minutes with these 2. Only limitation is your imagination really.
You can literally automate ANY internet task.
Go for it!
Simples.