Arsenal, Augmentation, Unwired, RC - Good, bad, ugly?, Is there anything in here that I should be wary of? Options

[Isam]

So I just started GMing an SR4 campaign after a 2-year hiatus. I am the only one in the group with any SR4 books (I'm using SR4.0 since I don't have the 4.5 book). I only had the Core book and Street Magic (that was all that had come out by the time I stopped playing). My wife went above and beyond for X-mas and now I also have Arsenal, Augmentation, Unwired, and the Runner's Companion. The group I'm gaming with has extensive gaming experience, and some of them have even played SR2, but none of them have ever seen SR4 before. I would love to actually use some of the stuff from the new books, but I'm a little wary of things that I may need to disallow/avoid/houserule. I've been working on reading my way through the books (I've gotten through most of Augmentation and the Companion), but can I get some advice on things that are particularly broken/exploitable/unworkable? I'm mostly looking for things that will upset game balance or be way too paperwork intensive to keep track of.

As a note, I am currently using the houserule that matrix actions are Logic+Skill with hits capped by program. I am also using many of Serbitar's house rules (except for the KarmaGen and some of the things that are more flavor than anything else). The group consists of 3 combat specialists and an adept infiltration expert, so none of them are really effected by the hacking rule change, but I'm NPCing a hacker for them (I decided I could only do 1 NPC, and I thought a hacker was more important than a full mage).

I attempted some search-fu, but I'm having serious trouble narrowing the results. If you just want to point me at other threads, I don't mind. My post-fu is also weak or I would have tried to get my word document with my house rules into the post somewhere, sorry.