- If you don't have a budget, go for a Topre Realforce 87U (it's expensive, but it's arguably one of the best; it's an "endgame" for some enthusiasts). You could also go for a CM Novatouch TKL, which also feature Topre (45g) switches.
- There are also cheaper Topre copies such as the Royal Kludge RC930-87 (which is what I'm typing on right now), but you can only really get them on Massdrop in the US.
- As I mentioned above, this category of switch (electro-capacitive) is the one I personally use. They are GREAT for typing, and I highly recommend them.
- Otherwise, I recommend the CM Storm Quickfire Rapid, or Rapid-i (if you need backlighting) with MX Browns (MX Blues would probably be too loud for an office). They are relatively inexpensive, and pretty reliable.
- If you want something rugged, check the link for the Realforce 87U because the same site sells KUL ES-87's which have really nice build quality (obviously a little more expensive though). Once again, I recommend MX Browns.
- If you don't mind using Massdrop (i.e. waiting a month for the group buy to complete and be delivered), there are occasionally group buys for Varmilo TKL keyboards. There is actually one right now, and it has a choice for Gateron switches, which are the best (?) Cherry MX clones.
You should probably do some more research to find out what you like. Make sure you check each switch for its sound test, sound is half of the experience of typing! Also, I highly recommend you invest a little more into a keyboard (assuming you type a lot).