It's really unnecessary, 40GB is much too small to fit much, 60GB is pretty small for that matter. However! It should be noted that you can use Intel's SSD Caching system to cache the SSD with the HDD that will speed up your boot times immensely, in fact to the performance of normal SSDs in some cases.
Also go with this instead.http://www.newegg.com/Product/Product.aspx?Item=N82E16820171667
You could check out my $1000 build here boosting the GPU, saving some money on the PSU, larger SSD. All the things you want, if you find that 128GB is unnessary, you can drop the 128GB down to a 60GB and you'll be pretty solid. http://www.squidoo.com/electronicandmore#module147312351