Yes, but I also want to make sure that I can do a little more too!
I for sure was wanting to use some Sensors.
Is teensy the right choice?
Lets see. The Teensy 3.0 has 14 pins that are capable of doing analog inputs, while the Teensy 3.1 has 21 analog input pins. Ten of the analog pins are brought out to the normal pins on the side for 3.0/3.1 for easy connection (2 more on the top are also easy to get to, and the Teensy 3.1 has one in the back). The other sensors need to be soldered to underneath the Teensy. The Uno has 6 analog input pins, while the Mega has 15, but they don't support HID as far as I know. The Leonardo has 11 analog input pins, but some of the inputs overlap with the digital pins.. The Due has 12 analog input pins.
If you wanted to do touch sensing, the Teensy's have 12 pins that can do touch reading. The Uno/Mega/etc. don't have this, and you have to use 2 pins to get the proper reading.
The Teensy 3.0 has I2S, and Teensy 3.1 adds CAN, but I don't believe there is library support for them at the current time.
If your sensors are read in from serial ports, both Teensy's have 3 serial ports. The Teensy 3.0 has an 8 byte FIFO on the primary UART, 4 word FIFO on the SPI bus, and a 4 word FIFO on i2s. Teensy 3.1 has 8 byte FIFOs on Serial1 and Serial2, a 4 word FIFO on SPI, an 8 word FIFO on I2S, and a 6 message FIFO on CAN. The Leonardo only has 1 serial port, while the Due has 3.
Since the Due also uses an arm processor, it runs at 3.3v just like the Teensy 3.x does, and so you need to use components that are spec'ed to run at 3.3v instead of 5v, or use voltage converters. Note, the Teensy 3.1 is tolerant of 5v devices on most of the pins.
The Teensy 3.0 runs at 48 or 96Mhz. The Teensy 3.1 runs at 72 or 96Mhz. The Due runs at 84Mhz. The AVR processors like the Leonardo run at 16Mhz or 8Mhz.
If you order the Teensy 3.0/3.1 straight from pjrc.com, you can get them to solder on the header pins for an additional charge of $3 for easy breadboard use.
If you solder a crystal on the Teensy 3.0/3.1 there is a real time clock and you can power the RTC with a coin battery when the main processor is powered off.
If you need PWM outputs, the Teensy 3.0 has 10 PWM's and 3.1 has 12.
Here are the specs: Teensy USB Development Board