Sony and Coby makes good brands of electronic boomboxes. Panasonic is another brand to look into when searching for an electronic boombox or stereo system as well.
The best upgrade package would be to go on to ITUNES music. Itune music has great music for your hardware boombox and also Microsoft music are really that would work great for hardware upgrades.
Please visit the Sirius website. That will be the best location to find pricing on their boombox. If it is not available there, I would suggest visiting Bestbuy.com.
In my opinion the best Sony Boombox on the market today would be the Sony CFDG700CP CD boom box CD/cassette recorder and it can be found at http://www.amazon.com/Sony-CFD-S350-Cassette-Portable-Boombox/dp/B0007XHLXO for the low price of $99.95 used.
There are many online shops that sell best boombox. Amazon.com is one of online shop that sells best boombox for any kind of models. You can visit www.amazon.com.
A decent boombox mp3 can be found on a variety of websites. Some examples are amazon.com or craigslist.com and Best Buy could be a store to find a boombox mp3.
a solar/wind up radio combo is best.
The Sony CDR/RW boombox with built in apple ipod dock has good consumer reviews, and allows for the use of Zune as well. It is available at Best Buy.
A Sirius boombox may be purchased The Source, Future Shop or Best Buy. Some mass retailers such as Walmart or Target may also carry a few models of the Sirius brand boombox.
The one that fits inside a large clear recycling bag! Seal the bag with tape. The sound comes out fine and you won't ruin your boombox. I do this all the time.
Insignia Water-Resistant Boombox with Apple iPod Dock is a good water-resistant boom box that may be preferrable to take to the beach or a pool.
Nextag has several different brands of boombox that include a built in mp3 player. The best brand for this is Sony; they also make relatively inexpensive ones. Check out their selection at http://www.nextag.com/boom-box-mp3-player/products-html.
Yes boomboxes are still available. It would be best beneficial as to check out Amazon.com. You can search for the best product that fits your needs, check out the review of the product and compare prices with various sellers.