Ubuntu can play mp3 files.

Is 160gb be enough?
Here is how I have my HD partitioned:
Windows NTSF 21gb
Ubuntu
/ ext4 20gb
swap 2gb
/home ext4 160gb

Let me explain this Ubuntu setup
1) "/" is a partition and where the root directory and OS will be located
with many subdirectories. Where Windows partitions are setup using a NTSF
system Ubuntu's latest setup is ext4. I use 20gb but I think 10gb would be
enough.
2) "swap" is partition, the OS uses this as a runtime cache. This partition
setup is automatically set by the OS.
3) "/home" is a partition, having a folder in each user's name. Windows
copied there "My Directory" system more or less off of this and is used in
the similar way, each user having their own. I have a 500gb HD but find
160gb is way more than I need right now.

You ask if 160gb is big enough. That depends on how big your Music
collection you want to put on the /home partition. 160gb is a lot of mp3s
but then again...

Before you do the partitioning and installation of Ubuntu backup anything
you don't want to loose. I have never lost anything repartitioning and
installing Ubuntu but crap happens. Then I'm sure you knew this but just a
reminder. I'm sure you propabally knew most of what I mentioned above.
Repartitioning and installing Ubuntu is not that hard a thing to do but the
first few times it sure is a scarry thing to do. I know, I, we, have all
been there too.

When you boot up after Ubuntu is installed GRUB, the GRand Unified
Bootloader, will present you with a menu of OSs, usually Ubuntu is the top,
first and default, OS. With no intervention the default OS will boot in
about 10 seconds.

Gordon said that Windows is too dumb to know about other OSs. I disagree
with that. Oh I' sure MS Windows knows about that "other" OS but like a
male lion and another male lion's cub, it will kill it with do regard. But
the result is just the same.