Well if it was me and you wanted a nice compact tank to sit on your desk I would go with a Minibow 2.5 made by AGA. I know it's a bowfront but it's small in size, comes in different colors so you can coordinate w/ the office. ALso you can replace the std bulb w/ a 10 watt screw-in daylight PC. Add a small heater and an Aqua Clear 150 for circulation. Total cost around $50.00 and can be purchased at your local PetsMart.
A little bit of substrate (1" or so) and two decent sized pieces of LR.
That setup should be able to house your basic
low light corals and maybe one small fish (Goby) and a small shrimp.
Change out 1/2 a gallon every week and wipe the front glass (plexi) down. Use the AQ 150 for circuklation but run carbon from time to time to keep the water looking crystal clear. Also might want to add so calcium to keep the LR pink and happy.
This would give you a presentable looking tank with a little reef in it that requires very low maintenance.
OK thats my idea --- but I do know that it's a bowfront and you said no bowfronts.