If your laptop have DVD drive, and you're a person that did not use DVD at all, then can ask the shop to disassemble the drive and replace it with HDD caddy, You can install another HDD or SSD in the HDD caddy, so no need external hdd. I will recommend buy 240GB SSD + external HDD. The choice to made is actually simple, do you able to afford SSD+external HDD or not. Through failure or the technology becomes either obsolete, too small or too slow. I've been working with computers for over 30 years, and from my experience the longest a hard drive has lasted is about 5 years. SSD will be the fastest then SSHD then HDD. The difference can be immediately noticed when you switch on the MacBook Pro: the RAM-only upgrade results in a 25 faster system boot, the SSD upgrade. SSD different, even after booting up your windows, your OS still run very fast after that, becoz whole OS is run on SSD. Suztera : Doesn't really matter with either, all will outlive you. SSHD only help you get faster start up/booting up windows. and SSD is whole lot faster, becoz your whole operating system is run on SSD, not just the cache files. I never use SSHD before, go for SSD is better coz doesn't need any special configuration or setting up. You need to install software or maybe if your mobo support, you need to configure it to use the SSD in the SSHD.

Here is comparison between HDD, SSD and SSHD hard drives based on various factors and their characteristics. Also the size of a SSD drive is relatively smaller as compared to SSHD. SSHD = HDD with small SSD inside of it, which is used to store windows start up cache files, the theory is like Intel Rapid Storage Technology, if you know about it. SSD is silent in operation and generates less heat as compared to SSHD drive.

Difference between ssd and sshd