Double glazing or new bathroom?

[crimsonlake]

Recently bought a new house following divorce so am on a budget. I knew the house needed the bathroom and kitchen updating but since I do not have the funds to do this I decided I would live with them as basically it was a spacious property. Problem is now as I live on a fairly busy road I have realised the double glazed windows do not offer the sound proofing I had hoped for. I think they are fairly old and do not seem to close properly at the seals, issue is really noticeable in the bedrooms. I have had a couple of quotes for the work, both close to 3K. Currently having a think about everything and need some help coming to a decision as to whether to go for the replacing the windows or spending the money on a new bathroom. Thinking longer term if I were to sell which would be the best option to add a little value and secure a quicker sale, - new windows on the front of the house or a new bathroom?

Another thing to consider is the width of the gap - if you get the most thermal efficient windows now, before winter, you can easily save money over the winter (and have a cooler house in the summer), meaning bathroom can be done quicker.

If you pay for new windows you will not recoup the outlay and save sufficient money on your bills over the course of one winter to pay for a new bathroom!

Wowfudge, I never expected to. The drive behind this is to cut out noise pollution as the windows are old, benefits from saving on heating costs were secondary at the time, but of course relevant. Also I hate the brown frames and think white would vastly improve the general appearance of the property.
My plan if I go ahead is to only replace the front windows. However a friend has pointed out it will be a case of ' fur coat and no knickers ' if I do not replace all of the windows now. I have a back bedroom window which is in ok condition, same with bathroom and landing windows down the side of the house. Really I cannot afford to replace them all, but thinking about eventual resale wondering if it will put people off if they have not all been replaced.
A further issue with replacing the rear bedroom window is that it is above a conservatory and would require scaffolding erecting to enable the window to be replaced at an extra substantial cost. Dilemma, leave them as they are, replace the front, replacing all is not an option really on my budget but I want to get it right.

OP my post was in response to Ariela rather than you directly.

@wowfudge I didn't say you'd recoup the outlay and save over one winter, just that you would make energy savings over winter thus enabling the bathroom to be done sooner that it would otherwise. I think when we did our DG it'd only have taken perhaps 2 winters to pay for a new bathroom suite (think HUGE draughty 1960/70s windows and we DIY everything)

Thanks for clarifying @Ariela.