All Tablet PCs

The Bottom Line: Too large to be a smart device, too small to be a useful Netbook, the import-only Viliv S5 is a neat proof-of-concept that is best for portable media playing.

Specs: Atom (1.33 GHz), 1 GB DDR2 SDRAM, 15.4 oz

The Bottom Line: With the LifeBook T1010, Fujitsu adds tablet functionality to an otherwise typical 13.3-inch laptop. It's a good choice for students and executives who prefer to take handwritten notes on the run.

Specs: Intel Core 2 Duo (2.26 GHz), 2 GB DDR3 SDRAM, 5.3 lbs, EPA Energy Star

The Bottom Line: The new generation of similarly sized Netbooks do more and cost less than the Samsung Q1 Ultra Premium, putting another nail in the UMPC coffin.

Specs: Intel (1.33 GHz), 1 GB DDR2 SDRAM, 1.9 lbs, EPA Energy Star

The Bottom Line: Ambitious but flawed, the Fujitsu LifeBook U810 has more of a traditional laptop design than other UMPCs, but the otherwise excellent keyboard is marred by the loss of several important keys.

Specs: Intel A110 (800 MHz), 1 GB DDR2 SDRAM, 1.6 lbs, 5.6 in TFT active matrix, EPA Energy Star, EPEAT Silver, Microsoft Windows Vista, Microsoft Windows Vista Home Premium

The Bottom Line: The lightweight Lenovo ThinkPad X60 Tablet now runs Windows Vista--and remains one of the best convertible tablets on the market.

Specs: Intel Core Duo (1.66 GHz), 1 GB DDR2 SDRAM, 3.7 lbs, EPA Energy Star

The Bottom Line: The Lenovo ThinkPad X60 Tablet strikes the best compromise between a ultraportable tablet and a full-featured laptop.

Specs: Intel Core Duo (1.66 GHz), 1 GB DDR2 SDRAM, 4.2 lbs, EPA Energy Star

The Bottom Line: The bulky Satellite R25 offers a beautiful display and plenty of features at a low price, but if you don't need the tablet functionality, there are better wide-screen notebooks on the market.

Specs: Intel Core Duo (1.6 GHz), 1 GB DDR2 SDRAM, 6 lbs, RoHS

The Bottom Line: Though inexpensive, the Portege M400 convertible tablet's middle-of-the-road performance and battery life may not be enough for the demanding business user. For basic tasks, however, it's a decent bargain.

Specs: Intel Core Solo (1.66 GHz), 512 MB DDR2 SDRAM, 4.4 lbs, RoHS

Editors' Take: This convertible laptop offers a 14.1-inch screen and a comfortable keyboard, but its supersized weight means you won't stray too far from a desk or a conference room table.

Specs: Intel Pentium M (1.7 GHz), 512 MB DDR SDRAM, 6.2 lbs

The Bottom Line: Lighter and smaller than the competition, the admittedly pricey Motion LE1600 is one of the best full-size slate tablets we've seen so far.

Specs: Intel Pentium M (1.5 GHz), 512 MB DDR2 SDRAM, 3.1 lbs